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SINKEVIS, ANTHONY was born 7 January 1912, received Social Security number 336-07-4789 (indicating Illinois) and, Death Master File says, died April 1982
Source: Death Master File (public domain). Check
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SINKEVIS, JOSEPH was born 9 September 1909, received Social Security number 336-07-4942 (indicating Illinois) and, Death Master File says, died July 1970
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SINKEVIS, LOTTIE was born 8 November 1909, received Social Security number 353-07-9066 (indicating Illinois) and, Death Master File says, died December 1976
Source: Death Master File (public domain). Check
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SINKEVIS, SYLVIA B. was born 18 July 1936, received Social Security number 357-26-8464 (indicating Illinois) and, Death Master File says, died 24 October 2012
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